Microsoft Streets and Trips 2002-2007 (s_and_t)

This format can...

read and write waypoints

This format is derived from the xcsv
format, so it has all of the same options as that format.

This is a format for creating data to be read by
Microsoft Streets and
Trips. It's been exercised on versions from 2003 through 2008. Detailed
instructions on how to use it, including preserving hyperlinks, are at
gpsbabel.org